Use client connect domain in VPN configs and fix legacy JSON import to PostgreSQL.

Co-authored-by: Cursor <cursoragent@cursor.com>

db/__init__.py

@@ -7,8 +7,10 @@ from .store import (
     ensure_db_ready,
     export_data_dict,
     import_from_json_file,
+    invalidate_data_cache,
     load_data,
     load_tunnel_state,
+    normalize_import_data,
     save_data,
     save_tunnel_state,
     update_tunnel_state,
@@ -24,8 +26,10 @@ __all__ = [
     'get_database_url',
     'import_from_json_file',
     'init_schema',
+    'invalidate_data_cache',
     'load_data',
     'load_tunnel_state',
+    'normalize_import_data',
     'restore_database_sql',
     'save_data',
     'save_tunnel_state',